package net.lab1024.sa.admin.util;

import lombok.Getter;
import org.springframework.aop.framework.AopProxyUtils;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

@Component
public class ApplicationContextUtil implements ApplicationContextAware {

    /**
     * -- GETTER --
     *  获取applicationContext
     */
    @Getter
    private static ApplicationContext applicationContext;
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        ApplicationContextUtil.applicationContext = applicationContext;
    }

    /**
     * 通过name获取 Bean.
     *
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }


    /**
     * 通过class获取Bean.
     *
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

    public static Class<?> getClazz(Object object) {
        Type[] genericInterfaces = AopProxyUtils.ultimateTargetClass(object).getGenericInterfaces();
        Type genericInterface = genericInterfaces[0];
        Type[] actualTypeArguments = ((ParameterizedType) genericInterface).getActualTypeArguments();
        return (Class<?>) actualTypeArguments[0];
    }
}
